Digits indicate the household in the order written down in the
Census.
Suffix a,b,c etc indicate order within the household, "a" is usually
the head of the household, "b" the wife, "c,d,e etc" are usually children.
Note an entry reference is not used in the Census, a Page reference
only being given. This Page reference is given in the listing eg:
---(p20, Wirksworth, district 6, HO 107/198/12)---.
The Home Office (Public Record Office) number can be used to order microfilm
of the Census from the PRO, or view at a reference library.

AGE column shows the age declared. Above age 15,
ages were intended to be rounded down to the nearest multiple of 5, and
younger ages to be exact.